摘要
本文提出了一种新的适用于MPEG2专用视频解码芯片的控制策略:分散控制。该方案完全由各功能模块相互协调控制整个视频解码过程,而不需要总体控制,它满足对MPEG2视频规定的所有级别尤其是MP@HL进行实时解码的要求。与总体控制方式比较,分散控制机制对视频解码各功能模块没有严格的时间限制,可根据具体解码任务特性设计模块从而达到局部性能最优;同时分散控制过程简单,解码效率高,而且连接各功能模块间的缓存相当小,可大幅度的减小芯片的硬件开销,使得系统整体性能最优。
A novel decentralized control scheme of dedicated MPEG2 video decoder is presented. The processes of decoding video signals are distributively controlled by functional units in stead of the central controlling unit. All levels, especially MP@HL, of MPEG2 video signals are decoded on real time. Compared with the central control scheme, our strategy of controlling relaxes the time restrict for functional units as to optimize their design to respective specific decoding tasks. On the other hand, the simple process of decentralized control leads to higher efficiency, less hardware and, in the end, the best overall performance.
出处
《电路与系统学报》
CSCD
2002年第1期78-82,共5页
Journal of Circuits and Systems
基金
浙江省综合信息网技术重点实验室资助项目
